Pritchard 2008, p. 88; Pitou 1990, p. 638. These sources only give the year 1842 for the date of his birth. A source is needed for the exact day of 8 March 1842. This date was added to the French Wikipédia by fr:Utilisateur:Huster without a source with this edit on 3 December 2005. Huster also gives his place of birth as Brussels. Pitou only gives Belgium for his place of birth and the year, 1907, for his death.
